diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1308e7d..e753673 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION 3.12)
 
 project("dbcppp" VERSION 3.8.0)
 
+add_compile_definitions(DBCPPP_EXPORT)
+
 # CONFIGURATION
 
 set(CMAKE_CXX_STANDARD 17)
diff --git a/src/Helper.h b/src/Helper.h
index 92c35a2..1e17bb3 100644
--- a/src/Helper.h
+++ b/src/Helper.h
@@ -8,7 +8,7 @@
 
 #include "EndianConfig.h"
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) || defined(__MINGW32__)
 #   include <stdlib.h>
 #   define bswap_32(x) _byteswap_ulong(x)
 #   define bswap_64(x) _byteswap_uint64(x)